Gas prices are unchanged this week across Arizona. Triple-A Arizona says the average price of gas in Arizona is $2.33 a gallon, which didn’t budge from last week. In Flagstaff, gas was down a penny on average from last week to sit at $2.38 a gallon. Some stations are selling gas for $2.31 a gallon and lower. In Prescott, gas was also down a cent to $2.34 a gallon. Some stations are selling gas for $2.21 and lower. Officials say gas supply is tightening and demand continues to be low, so that’s why gas prices this week didn’t see much movement.